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ID 15550

Transcription/translation -PolyA-tails - the end

Description:
The majority of eukaryotic mRNAs contain a tract of A residues at the end. These polyA-tails are not encoded in the DNA. Rather, they are added to the pre-mRNA "post-transcriptionally" (after transcription). The end of pre-mRNA is cut by a specific enzyme, and a polyA-tail is added to the mRNA strand. A signal sequence (yellow) in the 3' UTR (blue) guides the addition of the polyA-tail.
Keywords:
gene concept,translation 4,transcription
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